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Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

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In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..

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Ecological Research: Measuring & Analysis

This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

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The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

Psychiatry and mental disorders
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Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

temperature - abiotic factor
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This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..